下面的SQL查询执行大约需要6-7分钟，它将返回~5833135行，有什么可以帮助我解决它的性能问题吗

下面的SQL查询执行大约需要6-7分钟，它将返回~5833135行，有什么可以帮助我解决它的性能问题吗

SQL

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使用这样的查询，您无法优化太多内容

按照有效性的顺序：

• 在机器中放入足够的RAM以缓存整个数据库

• 为此查询设置尽可能大的

  work\u mem

• 如果

  EXPLAIN

  输出中存在嵌套循环联接（不太可能），则联接列上的索引可能会有所帮助

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您只能从一个表中进行选择，这是

左连接系列的第一个表

我想知道这是否符合您的要求：

select min(aml.id) as id,
       aml.name as name,
       round(sum(aml.debit), 2) as debit,
       round(sum(aml.credit), 2) as credit,
       round(sum(aml.balance), 2) as balance,
       aml.account_id as account_id,
       aml.move_id as move_id,
       aml.payment_id as payment_id,
       aml.statement_id as statement_id,
       aml.journal_id as journal_id,
       aml.date as date,
       aml.company_id as company_id,
       aml.invoice_id as invoice_id,
       aml.partner_id as partner_id,
       aml.company_currency_id as company_currency_id
from account_move_line aml
group by aml.name, aml.debit, aml.credit, aml.balance,
         aml.account_id, aml.move_id, aml.payment_id,
         aml.statement_id, aml.journal_id, aml.date,
         aml.company_id,  aml.invoice_id, aml.partner_id,
         aml.company_currency_id;

然后，您将通过如此多的列进行聚合，我想知道是否有必要进行聚合。
500万行，需要传输大量数据。冷数据还是热数据？为什么不使用表中的任何内容？删除它们或
内部连接
热帐户数据，直到需要7min@Mack . . . 至少您可以尝试优化一个简单得多的查询。
select min(aml.id) as id,
       aml.name as name,
       round(sum(aml.debit), 2) as debit,
       round(sum(aml.credit), 2) as credit,
       round(sum(aml.balance), 2) as balance,
       aml.account_id as account_id,
       aml.move_id as move_id,
       aml.payment_id as payment_id,
       aml.statement_id as statement_id,
       aml.journal_id as journal_id,
       aml.date as date,
       aml.company_id as company_id,
       aml.invoice_id as invoice_id,
       aml.partner_id as partner_id,
       aml.company_currency_id as company_currency_id
from account_move_line aml
group by aml.name, aml.debit, aml.credit, aml.balance,
         aml.account_id, aml.move_id, aml.payment_id,
         aml.statement_id, aml.journal_id, aml.date,
         aml.company_id,  aml.invoice_id, aml.partner_id,
         aml.company_currency_id;